最終更新日：2024/08/06
An event during the oxygenation event of Earth's past, where the level of free oxygen in the environment exceeds the toleration levels of most extant anerobic life, becoming toxic to existing life, which prior to the mass production of oxygen, was an anerobic reducing environment. This is sometimes considered a mass extinction event, or the first mass extinction event, but as all life was unicellular, there is no fossil boundary to mark the event for conventional paleontology to recognize it.
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oxygen catastrophe
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oxygen catastrophe
noun
An
event
during
the
oxygenation
event
of
Earth's
past,
where
the
level
of
free
oxygen
in
the
environment
exceeds
the
toleration
levels
of
most
extant
anerobic
life,
becoming
toxic
to
existing
life,
which
prior
to
the
mass
production
of
oxygen,
was
an
anerobic
reducing
environment.
This
is
sometimes
considered
a
mass
extinction
event,
or
the
first
mass
extinction
event,
but
as
all
life
was
unicellular,
there
is
no
fossil
boundary
to
mark
the
event
for
conventional
paleontology
to
recognize
it.
意味（1）
An
event
during
the
oxygenation
event
of
Earth's
past,
where
the
level
of
free
oxygen
in
the
environment
exceeds
the
toleration
levels
of
most
extant
anerobic
life,
becoming
toxic
to
existing
life,
which
prior
to
the
mass
production
of
oxygen,
was
an
anerobic
reducing
environment.
This
is
sometimes
considered
a
mass
extinction
event,
or
the
first
mass
extinction
event,
but
as
all
life
was
unicellular,
there
is
no
fossil
boundary
to
mark
the
event
for
conventional
paleontology
to
recognize
it.
意味（2）
